Ventilator.



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VENTILATUR.

(Application Bled .Tune 24, l1.899.)

(Modal.)

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,UNITED STATES PATENT l Trios.

CONRAD J. VOLLMER, OF LAFAYETTE, INDIANA.

VENTILATOR.

SPECIFICATION forming part of Letters Patent N o. 651,218, dated June 5,1900.

Application filed June 24, 1899. Serial No.. 721.704. (Model.)

To all whom, t may concern:

Be it known that I, CONRAD J. VOLLMER, o Lafayette, in the county ofTippecanoe and Statevot-Indiana, have invented a new and ImprovedVentilator, of which the following is a full, clear, and exactdescription.

The object of the invention is to provide a new and improved ventilatoror grate and cover for use on buildings and arranged to permit ot`conveniently uncovering the fixed grate for the passage of air to orfrom the part to be ventilated or to allow ot' covering the grate toexclude air in winter-time or during rainy weather.

The invention consists of novel features and parts and combinations ofthe same, as will be fully described hereinafter and then pointed out inthe claims.

A practical embodiment of my invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure lis a front view of the improvement as applied. Fig. 2 is anenlarged sectional plan view of the improvement. Fig. 3 is a transversesection of the same on the line 3 3 in Fig. 2. Fig. 4 is a sideelevation of the grate, and Fig. 5 is a like View of the cover.

The improved ventilator' is provided with a grate having a suitableframe A set in the wall of the building on which the ventilator is to beused, and said grate is provided with vertically-disposed slats B,extending from a rail B', integral with the bottom A of the frame A, theupper ends of the slats B terminating in a rail B2, integral with thesides of the frame A and located a suitable distance below the top A2 ofsaid frame to form sufl' cient space between the rail B2 and the top A2for the cover C to slide in at the time it is desired to leave theventilator open for admission and exit of air to or from the building.(See dotted lines in Fig. 3.)

The cover C for the grate is provided with a bottom rail C', from whichextend upwardly the integral slats C2, arranged to close the spacesbetween the slats B of the grate, as is plainly shown in Figs. l and 2,to prevent air from passing either to the building or from the same byway of the ventilator. The upper ends of the slats C2 terminate in arail C2,

from the grate.

which supports at its rear face a head C4, adapted to abutagainst theinner side ofv the top A2 to close the space between the said top andthe rail B2. Thus when the cover C is in position, as shown in Figs. l,2, and 3, the slats C2 completely close the spaces between adjacentslats B, especially as said slats C2 Iare somewhat wider thanthedistance between two 'adjacent slats B. (See Fig. 2.) The bottom railC of the cover C in addition reaches to the upper face ofthe bottom A ofthe frame in front of the' rail B, and the upper rail C2 of the coverextends in front of the rail B2, the head C4 closing the spacebctweenthe rail B2 and the top A2, so that no air can' pass through thegrate in either direction.A

On the front of the cover C, preferably at the middle thereof, near thebottom, is arranged a knob D, adapted to be taken hold of by theoperator to swing the cover C upward, with the upper ends of the slatsC2 as a fulcrum, on the rail B2 to allow of bringing the cover into anapproximately-horizontal position to permit the operator to then pushthe cover C rearward to the position shown' in dotted lines in Fig. 3.In order to hold the cover in this position, I provide the end slats C2of the cover with lugs E, located near the bottom rail C, the said lugsabutting against the front of the top A2 ofthe frame A to hold.

the cover C supported in an approximatelyhorizontal position, the mainportion of the body being inside of the building.

If desired, the cover C can be entirely removed frorn the grate, and forthis purpose the under side of the top A2 of the frame A is providedwith transverse notches A3 A4 for allowing the passage of the knob DandA the lugs E when the cover C is lifted from the position' shown indotted lines in Fig. 3 a sufiicient distance and is then slid inwardwithin the space between the rail B2 and the top A2 for the completedisengagement of the cover Normally, however, it is not necessary toremove the cover completely from the grate; but it can be left suspendedin a raised horizontal position in the upper portion of the grate, asabove described and as shown in dotted lines in Fig. 3. It is understoodthat when the cover is in this position air can freely pass through thespaces between the slats B of the grate to or from IOC the building.Vhen it is desired to again close the grate or cover the same bythecover C for the purpose mentioned, the operator simply pulls the cover Coutward, and then allows it to swing downward into the position shown infull lines in Figs. l, 2, and 3, so that, the slats C2 again close thespaces between the slats B of the grate.

Having thus fully described my invention,

I claim as new and desire to secure by Letters Patent-n 1. A ventilator,comprising a xed grate having spaced slats and a space above said slats,and a cover having a swinging connection with the grate and slidablethrough the space above said slats, as set forth.

2. A ventilator, comprising a grate having spaced slats extending fromone side thereof", and Aterminating in a rail spaced from the oppositeside of the grate, and a `cover slidable through the space between therail and the adjacent side of the grate and having one end arranged toswing on said rail, as set forth.

3. A ventilator,comprising a grate having a rail near one side andspaced from such side, and a cover for said grate, said cover beingfitted to slide in the space between the rail and adjacent side of thegrate and having one end arranged to swing on said rail, as set forth.

4. A ventilator, provided with a grate having a frame, slats terminatingat their upper en ds below the top of the frame to forma space betweenthe frame top and the upper ends of the slats, and a cover for saidgrate and provided with slats for covering the spaces between the slatsof the grate, the cover bein-g free to `be moved transversely throughthe space formed between the frame top and the upper ends of thegrate-slats, as set forth.

5. A ventilator, provided with a grate having a frame, slats terminatingat their upper ends below the top of the frame to form a space betweenthe frame top and the upper ends of the slats, a cover for said grateand provided with slats for covering the spaces `between the slats ofthe grate, the cover being free to be moved transversely through thespace formed between the frameutop and the

